Recognition of Taxi Violations Based on Semantic Segmentation of PSPNet and Improved YOLOv3

Table 4

Illegal occlusion mode and judgment mode of license plate.

Illegal occlusion of license plate	Judgment method
Total occlusion	Proportion of blue pixels
Single area partial occlusion	Aspect ratio of blue area
Multi area partial occlusion	Relative position of centroid in blue area